html {
    box-sizing: border-box;
}

*, *::before, *:after {
    box-sizing: inherit;
}

body {
    margin: 0;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif, serif;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, div {
    margin: 0;
    padding: 0;
}